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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Baader Adapter M54i to M48a

Baader Adapter M54i to M48a

by Baader Planetarium
SKU BAA-2958750
Sold out
$33.94 - $33.94
$33.94
$33.94 - $33.94
$33.94
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  • Converts Female M54 Thread (M54i)
  • Provides Male M48 Thread (M48a)
  • Enables Connection of 2" Filter Thread Accessories
  • Low-Profile Mechanical Design
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Baader Adapter M54i to M48a

    The Baader Adapter M54i to M48a directly converts a female M54 thread to a male M48 thread, bridging the gap between larger format correctors and the universal M48 standard used for 2-inch filters and camera adapters. This essential component ensures you can integrate your existing M48 accessories into an M54-based imaging train without compromising rigidity or alignment.

    Bridging M54 Correctors to Standard M48 Accessories

    Many modern telescope correctors, particularly those designed for larger sensors, utilize an M54 thread to avoid vignetting. The vast majority of accessories—from filter wheels and off-axis guiders to universal camera T-rings—are based on the M48 x 0.75 standard. This adapter physically bridges that gap, creating a secure, threaded connection between your M54-threaded component and your M48 accessory.

  • What is the primary function of the Baader Adapter M54i to M48a?

    Its function is to convert a female (internal) M54 thread into a male (external) M48 thread. This allows you to connect accessories with a female M48 thread, such as a 2-inch filter or camera adapter, to a device like a focuser or field flattener that has a female M54 port.

    I have a coma corrector with an M54 output. Can I use the Baader M54i to M48a adapter to attach my M48 T-ring for my DSLR?

    Yes, this is a perfect application for this adapter. It will thread into the female M54 port on your corrector and provide the male M48 threads needed to attach your standard M48 T-ring, connecting your DSLR to the imaging train.

    Will the Baader M54i to M48a adapter allow me to place a 2" filter in front of my camera on an imaging train that ends with an M54 female thread?

    Yes. You can thread this adapter into the M54 female port. The resulting male M48 thread is the standard for 2-inch filters, so you could then attach a filter cell or a filter drawer that accepts standard 2-inch mounted filters.

    Does the Baader M54i to M48a adapter add significant length to the optical path?

    Any adapter adds some length to the optical path. This adapter is designed to be low-profile to minimize its impact on back focus, but you must account for its thickness when calculating your imaging train spacing. The exact optical path length is not specified.

    Is the M48 thread on the Baader M54i to M48a adapter the same as a 2-inch filter thread?

    Yes. The M48 designation (specifically M48x0.75) is the technical name for the thread standard commonly known as the "2-inch filter thread." This ensures compatibility with a wide range of astronomical accessories.

    What do the "i" and "a" mean in the Baader M54i to M48a adapter's name?

    In Baader's naming convention, "i" stands for innen (German for internal or female thread), and "a" stands for außen (German for external or male thread). So, the adapter converts an M54 internal thread to an M48 external thread.

  • Net weight (kg) 0.01
    Inner Diameter / Clear Aperture (mm) 47 mm
    Outer Diameter 59 mm
    Optical length (mm) 1 mm
    Outer Connection (eyepiece/-camera-sided) M48
    Inner Connection (lens sided) M54 x 0.75
    Adapters Family M54 System
  • Baader Planetarium Warranty